

It appears the ad was being triggered inappropriately due to a time miscalculation error. Mozilla's flirtations with advertising – a way to augment and diversify its revenue beyond search engine deals – date back at least to 2014.

The company faced similar blowback in 2017 for its Mr. In 2020, Mozilla forced push notifications on Firefox users without permission to promote its blog post about the StopHateForProfit coalition, which tried to pressure Facebook to deal with harmful content. This is not the first time Mozilla has annoyed users with unwanted ads.
